The material is not very nice, because fully synthetic. The socks feel even scratchy, and so sweaty that I would not put my child. Also, they are a bit small as socks for the relevant age.
Because hands and feet in any case not at the same time come to the fore of the baby, but first the hands and feet until some time later, the wrist rattle would be sufficient. This has an adjustable velcro and is therefore also on the feet attached.
Our child has ultimately discovered both hands and feet and showed itself for the animals not interested. The hands Finder, we then attached to the seat belt so that they serve as prima employment in the baby seat, and they can also be found with almost a year still interested.